Idiom
lost the plot
Meanings
To become confused or unable to follow what is happening; to lose understanding of a situation or discussion.
To start behaving irrationally, unreasonably, or wildly; to stop acting in a sensible way.
Definition
To become confused or behave in a way that no longer makes sense.
If someone has lost the plot, they are no longer thinking clearly or acting logically. It is often used to criticize a sudden change to unreasonable, extreme, or chaotic behaviour. In British English it can also mean someone no longer understands what is happening in a discussion or situation.
Examples
- I think the manager has lost the plot if he expects us to finish by Friday.
- Halfway through the lecture, I completely lost the plot and stopped following the argument.
- She’s lost the plot since the reorganisation and keeps changing the plan every day.
- The conversation got so technical that I lost the plot within minutes.
Common mistake
Learners sometimes use it for a physical loss (like losing a piece of land), but it is mainly about confusion or irrational behaviour.
More at B2 level
- Bob's your uncle Used to say that something will be easy or will happen exactly as expected after a simple step.
- touch base To touch base means to briefly contact someone to share updates, confirm plans, or check progress.
- ballpark figure A ballpark figure is an approximate number or estimate, not an exact one.
- take the mickey To take the mickey means to mock someone or tease them in an unkind or cheeky way.
- cheap as chips Very cheap; costing very little money.
More idioms
- Bob's your uncle Used to say that something will be easy or will happen exactly as expected after a simple step.
- close but no cigar Used to say someone almost succeeded but did not quite achieve the goal.
- down to the wire Used to say something is decided or finished only at the last possible moment.
- ducks in a row To have everything organized and ready for action.
- brass monkeys “Brass monkeys” is used in the phrase “cold enough to freeze the balls off a brass monkey,” meaning…